react-native/React/DevSupport/RCTSamplingProfilerPackager...

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTSamplingProfilerPackagerMethod.h"
#import <JavaScriptCore/JavaScriptCore.h>
#import <jschelpers/JavaScriptCore.h>
#import "RCTJSEnvironment.h"
#import "RCTLog.h"
#if RCT_DEV // Only supported in dev mode
@implementation RCTSamplingProfilerPackagerMethod {
__weak id<RCTJSEnvironment> _jsEnvironment;
}
- (instancetype)initWithJSEnvironment:(id<RCTJSEnvironment>)jsEnvironment
{
if (self = [super init]) {
_jsEnvironment = jsEnvironment;
}
return self;
}
- (void)handleRequest:(__unused id)params withResponder:(RCTPackagerClientResponder *)responder
{
JSGlobalContextRef globalContext = _jsEnvironment.jsContextRef;
if (!JSC_JSSamplingProfilerEnabled(globalContext)) {
[responder respondWithError:@"The JSSamplingProfiler is disabled. See 'iOS specific setup' section here https://fburl.com/u4lw7xeq for some help"];
return;
}
// JSPokeSamplingProfiler() toggles the profiling process
JSValueRef jsResult = JSC_JSPokeSamplingProfiler(globalContext);
if (JSC_JSValueGetType(globalContext, jsResult) == kJSTypeNull) {
[responder respondWithResult:@"started"];
} else {
JSContext *context = _jsEnvironment.jsContext;
NSString *results = [[JSC_JSValue(globalContext) valueWithJSValueRef:jsResult inContext:context] toObject];
[responder respondWithResult:results];
}
}
- (void)handleNotification:(__unused id)params
{
RCTLogError(@"%@ does not implement onNotification", [self class]);
}
@end
#endif